Q60 of 100 Page 231

Explain why, wheels are so useful.

Wheels are important because they are used for transportation. Heavy machines can be moved from one place to another with the help of wheels because wheels can be rolled and the amount of force is also comparatively less.


More from this chapter

All 100 →
58

How will you reduce friction between those machine parts which rub against each other? Give the simplest method.

 59

What is meant by lubrication ? Why is it important?

 61

Why are lubricants (oil or grease) applied to rubbing surfaces of machines?

 62

Explain with the help of diagrams, how the use of oil reduces friction between two surfaces in contact with each other.